Re: [PATCH 04/31] mm, vmscan: begin reclaiming pages on a per-node basis

["Hillf Danton" <hillf.zj@alibaba-inc.com>]

> 
> This patch makes reclaim decisions on a per-node basis.  A reclaimer knows
> what zone is required by the allocation request and skips pages from
> higher zones.  In many cases this will be ok because it's a GFP_HIGHMEM
> request of some description.  On 64-bit, ZONE_DMA32 requests will cause
> some problems but 32-bit devices on 64-bit platforms are increasingly
> rare.  Historically it would have been a major problem on 32-bit with big
> Highmem:Lowmem ratios but such configurations are also now rare and even
> where they exist, they are not encouraged.  If it really becomes a
> problem, it'll manifest as very low reclaim efficiencies.
> 
> Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
> ---
Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>

>  mm/vmscan.c | 79 ++++++++++++++++++++++++++++++++++++++++++-------------------
>  1 file changed, 55 insertions(+), 24 deletions(-)

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>